Take-up device for sewing-machines.



Kommas. PATENTBD 1520.3, 1901 l M. E. BROWN. TAKE-UP DEVICE FOR swrgmMACHINES.

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UNITED STATES PATENT WEEE MICHAEL- E. B'ROWN, OF `BROOKLYN, NEW YORK,ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, ACORPORATION OF ILLINOIS.

TAKE-UP nvrcE FOR SEWING-MACHINES.

. nesvaszs.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application iled January 5. 1905. Serial No. 239.777.

ments in Take-Up Devices for Sewing-Ma chines, of which the following isa description, reference being had to the accompany ing drawing and tothe letters and vligures ci reference marked thereon.

My invention relates to an improvement l in sewing machine take-ups, ofthe type used -on the well known Union Special Sewing Machinel andillustrated for example in the patents to Muther vand Woodward, No.

A 299,569,1June A3, 1884, as modified by example, by the structureillustrated in Patent No. 401,776, to Dewees, of April 23, 1889 or615,647, Dec. 6, 1898, t'o Woodward. In connection with the operation ofsewing machines, including this type of take-up, 1t has been found instructures that when the machine isstopped for any reason, with, forexample,vthe needles in the goods, that the tendency of the operator isalmost invariably yto turn the belt wheel in the opposite direction fromthat in which it should be turned, andthis results in winding the loo erthread inthe groove of the take-u so t at before the machine can'success illy start into ofperation again, this groove must be cleareofits thread.

' It is the object of my invention to avoid this defect,`and broadlythis invention conslsts 1n the provision oi a device for guiding thethread Vout of the groove of the take-up cam, so that it will not windtherein. .The invention may be carrled out 1n a number of differentways, several forms of which are illustrated in the accompanyingdrawings, in which Figure 1 is a side view of a take-up mechanism for asewing machine embodying my invention, the thread-controlling cam disk`being shown as having a single cam face;

Fig2 is a view similar to Fig. 1 showing the controllingcam in adifferent position; the front disk being removed g Fig. 3 is a viewsimilar to Fig. 2, Vshowing the cam as accidentally turned backward. and`my im'-v proved thread-.controlling device as throwoifrom saidi cam;Fig. 4 is a view in side elevation of a modified form of my device, asapplied to a double cam take-up tmechanism; and Fig. 5 is 'a view inside elevation of another modified form of my device. p

The take-up cam 1 is of the ordinary construction, suchas shown in theWoodward retaining linger 4. A.. Said cast oilI finger and retainingfinger are supported by a suitable bracket 5, mounted on the base of themachine. Thread guiding arms 6 are also mounted upon said bracket 5, andextend forward on opposite sides of the thread-controlling cam 1. Thethread from the supply passes through guide eyes in the thread arins 6.i

As the thread-controlling cam rotates in the direction of the arrowshown in Fig. 1, the cam shoulder 7 formed by the shape of the cam diskengages the thread running between the said eyes, and as said cam movesforward the cast ofi` finger 3, lifts the thread up the straight lace ofthe cam until it is cast over said shoulder, The thread is then retainedby the retaining finger 4. This operation of the thread-oontrolling camis well' known in the art, and will not need further description.

When the cam disk reaches the positionA shown in Fig. 2 the thread isreleased by the retaining finger 4, and as the slack is thenl or infact, in any other position, the shoulderI 8 on the thread cam l wouldengage the thread running between the thread eyes and carry the samearound into the position shown in Fig. 3, and if no means were providedfor casting the thread oil' from this shoulder, it would be soon woundinto the take-up and break the thread.

As a means for casting thel thread from the 'shoulder othe cam wheirthesame is turned in/ the wrong direction, I have provided a cast oil'iinger 9, which, as shown in Fig. 3, is formed integral with the castoil' nger 3, and lies in the space between the disks forming the take-upcam. Said cast o'fl linger 9 extends downward a sufficient distance, soas If, perchance, the Ama-V fue to e age the thread, as shown in Fig. 3,and 'castne saine off from the thread shoulder. If the machine continuedto rotate or be turned in the wron direction, the castoif 'finger 9would continue tocast the threadv Afrom the shoulder on the earn. I havealso provided 'a cast off finger 10, which, as shown in Fig. 3, is alsoformed integral with the cast oi-lnger. "The object .of this finger 10,tov throw thetliread out from the cam disk, 1f the threadl should breakand be. carried around the shaft by the forward movement of the camdisk.

A"In'Fig 4, I have shown the take-np cam@ as being provided with two camfaces such as shown,for ex'ample,'in the patengt to Viood-v Ward,615,647; the operationy of these cam faces will be obvious, from saidpatent..

i When the cam disk is moving in the direction liso of thearrowf in Fig.4, the thread will.,be

- carried to the position indicated at 1`1'where' the'saniecontacts withthe retaining finger 3, and cast off from the shoulder on thetakeup cam.If, however, the cam disk is 'ro'- tated in the wrong direction, athread will'be carried to the position shown at 12,' in thisfigure,and-.the cast-0H `finger 9 lifti the thread to a osition so' that itwill Vbe cast ofi from theta 'e u cani shoulder.- In this fi ure, thethrea 'cast-off' iinger 9 is ma e shorterlthan Ain-glfii s. 1, 2 a'ii'd3, but must, however, be' of s cient length to cast the thread'off fromthe-.shoulder of the v4`take-up cain Thev cast-olfA finger v13, in Fig.4v ,is mounted on a bracket 14, secured to the base of themachinefandeirtends up'ui'iderneath' the shaft and around :the same inthe space between the cam disks and operatesto throw' the" threadoutofthespace between said cam dlsk, provided the thread is broken -andis carried around the shaft by thetake-up cam. InFig. 5 I havepshown 'my.cast o finger 1 5, as 'mounted 'ongthe bracket 14. It will-'be*obviousy lthat the` cast-ofi'l linger for throwing the .thread from thetakeup earn when the same is moved in the Wrong direction, may

be supported -inany suitable manner, so long as the .same'isproperlypositioned, 'relative to the take up cam, as to erfoi'mitsfunction. It will also bel obvious-'t at the cast'off iinger may beof any .shape 'or construction other than that shown, vthe essentialfeaturebeing to provide a surfacewhich willcontact with the' thread,and'lift it or cast it from the shoulder on the vtake-up cam.

Having thus described my invention, what I claim as vnew and desire tosecure by Letters Patent, is: .f .1. In a take-up device.forsewingmachines, the combination with a grooved` take`- up cam and acast-ofi` wire, upon which the thread is guided.,` and additional meansfor guiding the threadout ofthe groove of the take-up .to preventwindingthereon; substantially as described.

in presence of two witnesses.

2. In a sewing machine, the combination with a grooved .take-up cam, acast-off wire, and a second wire, adapted to guide" the stantiallyasdescribedf'v '3.- takeup device including incombinathread out ofthetake-up cam groove ;-v subq tion, a cam disk, thread 'uides arran ed oneach side offsaid cam and avin eyes or the passage of -the thread, saideyes eing located 'within the outer periphery of the cam, a cast.odevice acting on thethread when the cam is turnedd in yone direction,a second castolf acting on the thread when tur-ned in the op-'1 positedirection; substantially as described.

' 4, .A take,- p for sewing machines having a BS cam surface Aandrmeaiisu on' opposite s1 ofits axis to cast ofi threa from the'cam'surl "face,substantially as'described.

5.. In' a take-up device, arevolving cam surface, thread guides uponopposite sides of said cam surface, a' plurality' of means tov force thethread upon the outer periphery'of the cam surface,'said-riieans"beingvpositioned np'onvopposite sides oi said'thread gi'iides;v v90 v6.'.Atake-up device 'including incoinbinae' substantially as described.Y

tion, a grooved cam having thread-engaging-l with, and means locatedinsaid groove to cast the thread upon .the outer periphery of said` camsurface, when saidcaml is revolved ineither direction substantially asdescribed.

shoulders, vthread vguides v'ceperrafting" there.-

n 7 A take-up device, including combii nation, a disk having avcam,surfwe and a vconcentric portion, thread-g1 iding means cooperatingtherewith, and a p urality of means extending beyond the outer peripheryof saidconcentric portion for casting 'the thread' from'said cam surfaceonto said4 concentric portion; substantially as described.

8.' A take-u device, including in combination, ,space camfdisks, forminga groovebetween the same, said'cam disks including a. Y 'i caml surf-aceand a concentric surface, a cast- -oH located in the 'groove `betweensaid cam disks, endearing. a downward extension @X- fendmg 'beyond'thePath Of mOi/'ement of the 'i cam of the first-mentioned cast-of,-andhaving a prong extending below tl'ie'outei` peripheryofthe take-up;substantially as deascribed.

In testimony whereof I affix my signature',y

'Witnesses.:

' SAMUEL Con'EN,- W2 L. SWIFT,y

